A motor with waterproof function

Abstract

The invention relates to the field of motors, and discloses a motor with a waterproof function, comprising a casing, a stator assembly in the casing, the stator assembly comprising a winding coil and an insulating frame, a waterproof structure arranged on the insulating frame, the waterproof structure comprising a water retaining ring, a winding chamber formed by the water retaining ring and the insulating frame, and a sealing locking structure, the sealing locking structure comprising a first sealing airbag and a second sealing airbag respectively arranged at the upper end and the lower end of the winding chamber between the insulating frame and the water retaining ring, a locking block telescopically arranged on the inner wall of the water retaining ring, and a linkage control structure capable of controlling the locking block to extend and drive the first sealing airbag and the second sealing airbag to expand, the motor can be applied to different casings by arranging the waterproof structure on the insulating frame; and the waterproof structure is protected by the casing and is not easily deformed by collision; in addition, when the water retaining ring and the insulating frame are deformed, the first sealing airbag and the second sealing airbag are adaptively deformed to ensure sealing.

Description

Technical Field

[0001] The invention relates to the field of motors, and in particular to a motor with a waterproof function. Background Art

[0002] As a common driving component, motors are widely used in various devices. When the motor works in a humid or watery environment, the motor needs to be waterproofed. The motor consists of a rotor structure and a stator structure, so the waterproofing of the motor is mainly the waterproofing of the stator structure.

[0003] A Chinese patent application with application number 201620569039.X discloses a motor for a gear pump, including a motor housing and a front cover and a rear cover arranged at both ends of the motor housing; it also includes a stator assembly, the stator assembly has a first center hole, and the stator assembly includes a winding coil and an insulating frame; a rotor shell is arranged in the first center hole, one end of the rotor shell is sealingly mounted on the front cover, the motor housing is respectively sealed with the front cover, the rear cover and the rotor shell to form a sealed cavity, and the stator assembly is arranged in the sealed cavity.

[0004] This solution achieves sealing and waterproofing of the winding coil by installing the stator assembly in a sealed cavity. However, the motor housing, front cover and rear cover, as the external protective layer of the entire motor, are inevitably bumped and deformed during transportation, installation or use; in addition, if the motor is not installed flat or the motor is overloaded and generates high temperature during subsequent use, it will cause the motor housing to twist and deform. The above deformation will cause the sealing degree of the sealed connection between the motor housing and the front cover and the rear cover to decrease or even disappear, causing the waterproof performance to decrease or disappear. In addition, many existing motors have a casing composed of two annular claw poles spliced ​​together, and a completely sealed state cannot be formed at the splicing of the annular claw poles, resulting in the inability to achieve waterproofing. Summary of the invention

[0005] The present invention aims to address the shortcomings in the prior art that some motor casings cannot be sealed during assembly, and that casings that can be sealed are easily deformed, which reduces or even eliminates the sealing degree at the connection with the end cover, resulting in a decrease or loss of waterproof performance. The present invention provides a waterproof motor with improved waterproof performance of the stator assembly.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A motor with waterproof function, comprising a housing equipped with a stator assembly, the stator assembly comprising an insulating frame and a winding coil wound on the insulating frame, and a waterproof structure for preventing the winding coil from contacting water is arranged on the insulating frame;

[0008] The waterproof structure includes a water retaining ring which is sleeved outside the insulating frame and forms a winding chamber for winding the winding coil between the insulating frame and the water retaining ring, and a sealing locking structure is provided between the insulating frame and the water retaining ring to limit the separation of the two and realize the sealing of the winding chamber;

[0009] The sealing locking structure includes a first sealing airbag and a second sealing airbag which are respectively embedded at the upper end and the lower end of the winding chamber between the insulating frame and the water retaining ring and can expand or contract, a locking block which is telescopically arranged on the inner wall of the water retaining ring and is plugged with the insulating frame when partially extended to limit the separation of the two, and a linkage control structure;

[0010] The linkage control structure can control the locking block to extend and drive the first sealing airbag and the second sealing airbag to expand, or control the locking block to retract and drive the first sealing airbag and the second sealing airbag to retract.

[0011] With the above scheme, the winding coil is wound on the insulating frame, and the water retaining ring is concentrically sleeved outside the insulating frame. The linkage control structure controls the locking block to partially extend and plug into the insulating frame to limit the separation of the water retaining ring and the insulating frame. At the same time, the first sealing airbag is driven to expand so that the insulating frame and the water retaining ring at the lower end of the winding coil are sealed. The second sealing airbag can also be driven to expand so that the insulating frame and the water retaining ring at the upper end of the winding coil are sealed. Finally, the separation of the water retaining ring and the insulating frame is limited while the sealing of the winding chamber is achieved. The winding coil is located in the sealed winding chamber, thereby achieving a waterproof effect.

[0012] Since the waterproof structure is arranged on the insulating frame, it does not need to be matched with the casing, so it can be installed in any casing and has a wider applicability. Moreover, the waterproof structure is located inside the casing and is not easily deformed by collision under the protection of the casing. In addition, the seal between the water retaining ring and the insulating frame is achieved by the expansion deformation of the first sealing airbag and the second sealing airbag. Even if the water retaining ring and the insulating frame are deformed, the first sealing airbag and the second sealing airbag can be adaptively deformed under the positive pressure inside the two to ensure the sealing between the water retaining ring and the insulating frame.

[0013] Preferably, the linkage control structure includes a sealing ring groove recessed on the upper end surface of the water retaining ring and connected to the first sealing airbag and the telescopic groove for sealing and telescoping of the locking block, and a sealing member that can be sealably inserted into the sealing ring groove; a tension spring is provided in the telescopic groove for normally separating the locking block from the insulating frame; and a sealing limit portion is provided between the seal and the insulating frame for causing the second sealing airbag to expand while locking the insulating frame and the seal when the first sealing airbag is inflated and the locking block is plugged into the insulating frame.

[0014] By adopting the above scheme, the sealing member is inserted into the sealing ring groove, and part of the air in the sealing ring groove is squeezed into the telescopic groove. The positive pressure in the telescopic groove increases continuously until it is greater than the resistance on the locking block, driving the locking block to move away from the bottom of the telescopic groove, so that the locking block can be plugged into the insulating frame after being partially extended; another part of the air in the sealing ring groove is squeezed into the first sealing airbag, driving the first sealing airbag to expand to seal against the insulating frame. While achieving sealing, the water retaining ring is prevented from separating from the insulating frame. Finally, the sealing member is locked by the sealing limiter to limit the movement of the sealing member away from the bottom of the sealing ring groove. While keeping the first sealing airbag expanded and the locking block partially extended, the second sealing airbag is driven to expand to seal against the water retaining ring.

[0015] Preferably, the sealing limit portion includes a threaded ring groove recessed on the insulating frame and connected to the second sealing airbag, and the sealing member includes a plug-in ring sealingly plugged into the sealing ring groove and a threaded ring provided on the plug-in ring and sealingly mating with the threaded ring groove.

[0016] With the above solution, the plug-in ring seal is inserted into the sealing ring groove until the threaded ring touches the threaded ring groove, and then the plug-in ring is rotated to drive the threaded ring to rotate. Under the thread cooperation of the threaded ring and the threaded ring groove, the threaded ring seal is screwed into the threaded ring groove, so that the plug-in ring continues to rotate and insert into the sealing ring groove to further increase the positive pressure inside the first sealing airbag and the telescopic groove. When the threaded ring seal is screwed into the threaded ring groove, the sealing member and the insulating frame are fixedly connected by thread, and the air in the threaded ring groove is squeezed into the second sealing airbag, driving the second sealing airbag to inflate and expand until it contacts the water retaining ring seal.

[0017] Preferably, a accommodating ring groove is recessed at the bottom of the sealing ring groove, the accommodating ring groove is connected to the winding chamber, a glue storage bag storing liquid potting glue is sealed and embedded in the accommodating ring groove, and an extrusion ring is convexly provided at the bottom of the plug-in ring, which can be sealably inserted into the accommodating ring groove to puncture the glue storage bag and squeeze the liquid potting glue into the winding chamber when the locking block is plugged into the insulating frame and the first sealing airbag and the second sealing airbag are inflated.

[0018] With the above solution, if only the first sealing airbag and the second sealing airbag are used for sealing, the rubber may age or break during long-term use, resulting in failure of the waterproof structure. Therefore, after the winding chamber is sealed, liquid potting glue is injected into the winding chamber for filling. The liquid potting glue completely fills the winding chamber and forms a sealing layer after solidification, further improving the waterproof performance. The winding chamber needs to be sealed first to prevent the liquid potting glue from overflowing from between the insulating frame and the water retaining ring and failing to completely fill the winding chamber.

[0019] The liquid potting glue is sealed and stored in the glue storage bag, and the glue storage bag is stored in the accommodating ring groove and is sealed and embedded with the accommodating ring groove, ensuring that the glue storage bag can seal and block the glue inlet channel between the accommodating ring groove and the winding chamber before being punctured by the extrusion ring, thereby ensuring that the air in the sealing ring groove can be squeezed into the first sealing airbag and the telescopic groove. After achieving the anti-slip limit between the water retaining ring and the insulating frame and achieving the sealing of the winding chamber, the extrusion ring is sealed and inserted into the accommodating ring groove to destroy the glue storage bag, so that the liquid potting glue flows into the accommodating ring groove and is injected into the winding chamber under the extrusion of the extrusion ring.

[0020] Preferably, the plug-in ring includes a driven ring integrally arranged with the threaded ring and a driving ring sealingly screwed to the outside of the driven ring, the extrusion ring is convexly arranged on the driving ring, and the rotational resistance between the driving ring and the driven ring is greater than the rotational resistance between the threaded ring and the threaded ring groove.

[0021] In adopting the above scheme, in order to ensure the sealing performance, before the extrusion ring seal is inserted into the accommodating ring groove for glue injection, the first sealing airbag and the second sealing airbag need to be expanded to a fully expanded state. The extrusion ring needs to go down a long distance to squeeze glue. If the extrusion ring descends and damages the glue storage bag and the entire plug-in ring and the threaded ring continue to rotate and descend during the process of squeezing glue, the positive pressure inside the first and second sealing airbags will be too large, causing the first and second sealing airbags to over-expand, which will affect the service life of both at the least, and cause both to explode, break and fail at the worst. Therefore, a driven ring and a driving ring are provided. When the driven ring is inserted into the sealing ring groove before the maximum stroke, the driving ring and the driven ring rotate synchronously. When the driven ring is inserted into the sealing ring groove after the maximum stroke, the driving ring rotates relative to the driven ring. The maximum stroke of the driven ring inserted into the sealing ring groove is: the bottom of the driven ring abuts against the bottom of the sealing ring groove, and the bottom of the driven ring also seals and blocks the connection between the sealing ring groove, the first sealing airbag and the telescopic groove, preventing the gas from continuing to enter the first sealing airbag and the telescopic groove and preventing the gas in the first sealing airbag and the telescopic groove from leaking; at the same time, the bottom of the threaded ring abuts against the bottom of the threaded ring groove.

[0022] The driven ring and the driving ring are first inserted into the sealing ring groove in a synchronous and sealed manner so that the insulating frame at the lower end of the winding coil and the water retaining ring are sealed by the first sealing airbag; then, the driving ring only needs to be rotated, and the driving ring first rotates synchronously with the driven ring so that the threaded ring is sealed and screwed into the threaded ring groove, so that the insulating frame at the upper end of the winding coil and the water retaining ring are sealed by the second sealing airbag; at this point, the winding chamber has formed a sealed environment. At this time, the driven ring is inserted into the sealing ring groove to the maximum stroke, the bottom of the threaded ring abuts against the bottom of the threaded ring groove, and the bottom of the driven ring abuts against the bottom of the sealing ring groove. The threaded ring and the driven ring cannot continue to descend, so that both of them continue to rotate. Since the rotation resistance between the threaded ring and the threaded ring groove increases significantly to be greater than the rotation resistance between the driving ring and the driven ring, the driving ring is continued to be rotated, so that the driving ring can be rotated relative to the driven ring and continue to be inserted into the sealing ring groove, thereby driving the extrusion ring to rotate and insert into the accommodating ring groove.

[0023] Preferably, the side of the extrusion ring away from the plug-in ring is configured to be blade-shaped.

[0024] By adopting the above solution, when the extrusion ring is rotated and inserted into the accommodating ring groove, the blade can cut the plastic storage bag more conveniently.

[0025] Preferably, a sealing rubber ring is fixedly arranged at the bottom of the sealing ring groove to seal and block the accommodating ring groove.

[0026] By adopting the above scheme, the sealing rubber ring seal blocks the accommodating ring groove to prevent the gas from entering the winding chamber through the accommodating ring groove when the plug-in ring seal is inserted into the sealing ring groove, thereby ensuring that the gas can enter the first sealing airbag and the telescopic groove, and the sealing rubber ring can be cut by one side of the extrusion ring set to be blade-shaped, and the extrusion ring can seal and squeeze through the cut sealing rubber ring.

[0027] Preferably, a one-way exhaust structure is provided at the top of the winding chamber for exhausting the gas in the winding chamber after the liquid potting glue is injected.

[0028] With the above solution, when the liquid potting glue is squeezed into the sealed winding chamber, it falls to the bottom of the winding chamber under the action of gravity, and the liquid level of the liquid potting glue in the winding chamber gradually rises, driving the gas in the winding chamber to the top of the winding chamber and exhausting it through the one-way exhaust structure on the top, so as to ensure that the liquid potting glue completely fills the winding chamber. And the excess liquid potting glue can also be discharged from the winding chamber through the one-way exhaust structure.

[0029] Preferably, the one-way exhaust structure includes a third air passage connected to the outside world arranged at the top of the winding chamber, and a seal elastically raised and lowered arrangement on the insulating frame that seals and blocks the third air passage under normal conditions and rises to expose the third air passage when the pressure in the winding chamber increases.

[0030] By adopting the above scheme, the liquid potting glue is squeezed into the winding chamber, and the gas in the winding chamber is driven to the top of the winding chamber, so that the air pressure in the winding chamber increases, the seal is opened, and the gas is discharged from the winding chamber to the outside through the third airway. After the interior of the winding chamber is filled with liquid potting glue, as the liquid potting glue continues to be squeezed into the winding chamber by the extrusion ring, the hydraulic pressure in the winding chamber increases, and the seal can also be opened. Excess liquid potting glue can also be discharged until the drive ring stops rotating, the liquid potting glue no longer squeezes into the winding chamber, and the seal elastically falls back to seal and block the third airway. The liquid potting glue discharged from the groove can be used to determine that the liquid potting glue has completely filled the winding chamber. And the liquid potting glue filled in the third airway forms a seal after solidification and fixes the seal on the insulating frame.

[0031] The present invention has significant technical effects due to the adoption of the above technical solution:

[0032] The waterproof structure is arranged on the insulating frame and does not need to be matched with the housing, so it can be installed in any housing and has wider applicability. Moreover, the waterproof structure is located inside the housing and is not easily deformed by collision under the protection of the housing. Even if the water retaining ring and the insulating frame are deformed, the first sealing airbag and the second sealing airbag can be adaptively deformed under the positive pressure inside the two to ensure the sealing between the water retaining ring and the insulating frame;

[0033] After the winding chamber is sealed, liquid potting glue is injected into the sealed winding chamber for filling and curing to further increase the waterproof performance;

[0034] A driving ring and a driven ring are provided to prevent the first sealing airbag and the second sealing airbag from being damaged due to excessive internal pressure, which may lead to sealing failure. Through the above three advantages, the waterproof performance of the stator assembly is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is an axonometric diagram of a motor with waterproof function in an embodiment;

[0036] Figure 2 is a top view of a motor with waterproof function in an embodiment;

[0037] Figure 3 yes Figure 2 Sectional view at AA in the figure;

[0038] Figure 4 yes Figure 3 The enlarged view of point B in the figure;

[0039] Figure 5 yes Figure 3 The enlarged view of point C in the figure;

[0040] Figure 6This is a disassembled diagram of a stator assembly and a waterproof structure in a motor with a waterproof function in an embodiment;

[0041] Figure 7 yes Figure 6 The enlarged view of point D in the figure;

[0042] Figure 8 yes Figure 6 The enlarged view of point E in the figure;

[0043] Fig. 9 is a half-section schematic diagram of a waterproof structure in a motor with a waterproof function before being assembled with an insulating frame in an embodiment;

[0044] Fig.10 yes Fig. 9 Enlarged view of point F in the middle;

[0045] Fig.11 It is a partial enlarged view of a motor with waterproof function in an embodiment, in which a water retaining ring is sleeved on an insulating frame and a sealing member is assembled;

[0046] Fig.12 It is a partial enlarged view of a motor with waterproof function in an embodiment in which a water retaining ring is fixed on an insulating frame and the lower end of the winding chamber is sealed but the upper end is not sealed;

[0047] Fig.13 It is a partial enlarged view of a motor with waterproof function in an embodiment when a water retaining ring is fixed on an insulating frame and a winding chamber is sealed;

[0048] Fig.14 It is a partial enlarged view of a winding chamber when liquid potting glue is filled in a motor with waterproof function in an embodiment.

[0049] The parts indicated by the numbers in the above figures are as follows: 1. Center hole; 2. Annular chamber; 3. Casing; 4. Winding coil; 5. Insulating frame; 501. Annular body; 502. First annular folded edge; 503. Second annular folded edge; 6. Water retaining ring; 7. Annular slot; 8. Winding chamber; 9. Sealing ring groove; 10. Plug-in ring; 1001. Driving ring; 1002. Driven ring; 11. Connecting ring; 12. Threaded ring; 13. Threaded ring groove; 14. First installation Ring groove; 15, first sealing airbag; 16, first matching ring groove; 17, telescopic groove; 18, locking groove; 19, locking block; 20, first air duct; 21, second installation ring groove; 22, second sealing airbag; 23, second matching ring groove; 24, second air duct; 25, accommodating ring groove; 26, rubber storage bag; 27, sealing rubber ring; 28, rubber inlet channel; 29, extrusion ring; 30, groove; 31, third air duct; 32, plugging; 33, spring; 34, tension spring; 35, through hole. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0051] A motor with waterproof function, referring to Figures 1 to 14 , including a rotor structure and a stator structure. The rotor structure and the installation method of the rotor structure and the stator structure are prior arts, and the present solution does not improve the two, so they are not shown in the figure and will not be described here. The stator structure includes a casing 3, and the casing 3 has a central hole 1 for inserting the rotor structure. There is an annular chamber 2 inside the casing 3, and a stator assembly is assembled in the annular chamber 2, and the stator assembly includes an insulating frame 5 and a winding coil 4 wound on the insulating frame 5.

[0052] The insulating skeleton 5 includes an annular body 501 for winding the winding coil 4, and the end of the annular body 501 located at the upper end of the winding coil 4 is horizontally folded outward to form a second annular folded edge 503, and the end of the annular body 501 located at the lower end of the winding coil 4 is horizontally folded outward to form a first annular folded edge 502. That is, the winding coil 4 is wound on the annular body 501 and is located between the first annular folded edge 502 and the second annular folded edge 503. The outer diameter of the winding coil 4 is smaller than the outer diameters of the first annular folded edge 502 and the second annular folded edge 503, so that the insulating skeleton 5 composed of the annular body 501, the first annular folded edge 502 and the second annular folded edge 503 can be wound around the winding coil 4 and prevent the winding coil 4 from contacting the housing 3.

[0053] The insulating frame 5 is provided with a waterproof structure to prevent the winding coil 4 from contacting with water. The waterproof structure includes a water retaining ring 6 concentrically sleeved on the insulating frame 5. In this embodiment, the inner diameter of the water retaining ring 6 is equal to the outer diameter of the second annular folded edge 503, the outer diameter of the first annular folded edge 502 is larger than the outer diameter of the water retaining ring 6, and the upper end surface of the first annular folded edge 502 is concavely provided with an annular slot 7 for the water retaining ring 6 to be inserted axially along the insulating frame 5. When the water retaining ring 6 is sleeved on the insulating frame 5, one end of the water retaining ring 6 is inserted into the annular slot 7, and is sleeved on the second annular folded edge 503 and the outside of the winding coil 4.

[0054] A winding chamber 8 for accommodating the winding coil 4 is formed between the water retaining ring 6 and the insulating frame 5, and a sealing locking structure is arranged between the water retaining ring 6, the first annular folded edge 502 and the second annular folded edge 503 to limit the water retaining ring 6 on the insulating frame 5 and seal the winding chamber 8.

[0055] The sealing locking structure includes a first mounting ring groove 14 recessed on the inner ring wall of the water retaining ring 6, a first sealing airbag 15 is fixedly arranged in the first mounting ring groove 14, and a first matching ring groove 16 is recessed on the side wall of the annular slot 7 that is in contact with the inner ring wall of the water retaining ring 6. When the water retaining ring 6 is inserted into the annular slot 7 and is in contact with the bottom of the annular slot 7, the first mounting ring groove 14 and the first matching ring groove 16 are directly opposite. The first sealing airbag 15 is normally contracted and accommodated in the first mounting ring groove 14, and when expanded, it is inserted into the first matching ring groove 16 and is sealed and abutted with the first matching ring groove 16 and the first mounting ring groove 14. The expansion of the first sealing airbag 15 is controlled by the linkage control structure.

[0056] The linkage control structure includes a sealing ring groove 9 concentrically recessed on the upper end surface of the water retaining ring 6 and a sealing member that can be sealably inserted into the sealing ring groove 9. A first air channel 20 is provided in the water retaining ring 6 to seal and connect the sealing ring groove 9 and the first sealing airbag 15. The sealing member is sealably inserted into the sealing ring groove 9 to squeeze the air in the sealing ring groove 9 into the first sealing airbag 15 through the first air channel 20 to drive it to expand.

[0057] A telescopic groove 17 is recessed below the first mounting ring groove 14 on the inner ring wall of the water retaining ring 6, and the first air passage 20 has three ports, which are respectively connected to the bottom of the sealing ring groove 9, the bottom of the telescopic groove 17 and the inside of the first sealing airbag 15 in a sealed manner, so as to achieve sealed communication among the sealing ring groove 9, the telescopic groove 17 and the first sealing airbag 15. A locking block 19 is provided in the telescopic groove 17 for sealing and telescoping, and an annular locking groove 18 is concentrically recessed on the side wall where the annular slot 7 fits the inner ring wall of the water retaining ring 6, and when the first mounting ring groove 14 and the first matching ring groove 16 are facing each other, the locking groove 18 is also facing the telescopic groove 17.

[0058] The locking block 19 is normally received in the telescopic groove 17, and the sealing member is sealed and inserted into the sealing ring groove 9, so that the air in the sealing ring groove 9 is squeezed into the first sealing airbag 15 and the telescopic groove 17 through the first air channel 20 at the same time, and the first sealing airbag 15 is driven to expand while driving the locking block 19 to partially extend and insert into the locking groove 18. In this embodiment, a tension spring 34 is provided between the telescopic groove 17 and the locking block 19, and the two ends are respectively fixedly connected to the two. When the tension spring 34 is in the initial state, the locking block 19 is received in the telescopic groove 17. The setting of the tension spring 34 allows the locking block 19 to retract into the telescopic groove 17 when the positive pressure in the telescopic groove 17 disappears, so as to facilitate the disassembly and replacement of the water retaining ring 6. The telescopic groove 17, the locking block 19, the tension spring 34 and the first air channel 20 are arranged in a plurality of groups at circumferential intervals around the first annular fold 502, so as to increase the connection strength between the water retaining ring 6 and the first annular fold 502. The locking groove 18 is arranged in a ring shape, so that when a plurality of locking blocks 19 are partially extended at the same time, they can all be smoothly inserted into the locking groove 18 for locking.

[0059] The seal comprises a plug-in ring 10 which is plugged in and seals with the sealing ring groove 9 and a threaded ring 12 which is arranged on the plug-in ring 10. The upper end surface of the second annular fold 503 is concavely provided with a threaded ring groove 13 for the threaded ring 12 to be inserted and rotated in a sealing manner. The threaded engagement between the threaded ring 12 and the threaded ring groove 13 restricts the seal from moving away from the first annular fold 502, so that the first sealing airbag 15 remains in an expanded state, and the locking block 19 remains in a plugged state with the locking groove 18.

[0060] A second mounting ring groove 21 is concavely provided on the outer ring wall of the second annular fold 503, a second sealing airbag 22 is fixedly provided in the second mounting ring groove 21, a second air passage 24 is provided in the second annular fold 503, two ends of which are respectively connected in a sealing manner with the bottom of the threaded ring groove 13 and the inside of the second sealing airbag 22, and a second matching ring groove 23 is concavely provided on the inner ring wall of the water retaining ring 6. When the first mounting ring groove 14 and the first matching ring groove 16 are facing each other, the second mounting ring groove 21 is also facing each other with the second matching ring groove 23. The second sealing airbag 22 is normally contracted and accommodated in the second mounting ring groove 21. When the threaded ring 12 is sealed and screwed into the threaded ring groove 13, the air in the threaded ring groove 13 is squeezed into the second sealing airbag 22 through the second air passage 24, and the second sealing airbag 22 is driven to expand and then inserted into the second matching ring groove 23 and sealedly abut the second matching ring groove 23 and the second mounting ring groove 21.

[0061] The plug-in ring 10 includes a driven ring 1002 and a driving ring 1001 that is sealingly threadedly connected to the outside of the driven ring 1002. The side of the driven ring 1002 away from the first annular fold 502 is horizontally folded inward to form a connecting ring 11, and the side of the connecting ring 11 away from the driven ring 1002 is vertically folded downward to form a threaded ring 12, and the side of the threaded ring 12 close to the driven ring 1002 is processed into a threaded shape. A through hole 35 is vertically penetrated on the connecting ring 11. When the plug-in ring 10 is plugged into the sealing ring groove 9 and the threaded ring 12 is sealed and screwed into the threaded ring groove 13, a sealed space is enclosed and formed between the driven ring 1002, the connecting ring 11, the threaded ring 12, the second annular folded edge 503, the water retaining ring 6 and the second sealing airbag 22. The through hole 35 connects the space with the outside to balance the air pressure and prevent the air in the space from being compressed to form a positive pressure during the sealed rotation and descent of the driven ring 1002, the connecting ring 11 and the threaded ring 12, thereby hindering the sealed rotation and descent of the three.

[0062] The rotational resistance between the driving ring 1001 and the driven ring 1002 is much greater than the rotational resistance between the threaded ring 12 and the threaded ring 12 groove. During the rotation of the driving ring 1001, the driving ring 1001 first rotates synchronously with the driven ring 1002 to make the threaded ring 12 seal and screw into the threaded ring groove 13 until the threaded ring 12 and the threaded ring groove 13 are completely tightened, that is, the bottom of the threaded ring 12 abuts against the bottom of the threaded ring groove 13. At this time, the bottom of the driven ring 1002 abuts against the bottom of the sealing ring groove 9 and seals and blocks the first air channel 20. The through hole 35 seals and abuts against the upper end face of the water retaining ring 6. The driven ring 1002 and the threaded ring 12 no longer rotate, that is, the rotational resistance between the threaded ring 12 and the threaded ring groove 13 increases significantly to be greater than the rotational resistance between the driving ring 1001 and the driven ring 1002. The driving ring 1001 rotates relative to the driven ring 1002 and continues to be inserted into the sealing ring groove 9. That is, when the locking block 19 is plugged into the locking groove 18, the first sealing airbag 15 and the second sealing airbag 22 are fully expanded and the first air passage 20 is sealed and blocked, the driving ring 1001 will rotate relative to the driven ring 1002 and continue to be inserted into the sealing ring groove 9.

[0063] The bottom of the sealing ring groove 9 is concavely provided with a containing ring groove 25, and the lower end of the side wall of the containing ring groove 25 is provided with a glue feeding channel 28 connected with the winding chamber 8, and a glue storage bag 26 is sealed and embedded in the containing ring groove 25, and liquid potting glue is sealed and stored inside the glue storage bag 26. The sealed and embedded glue storage bag 26 seals and blocks the glue feeding channel 28. A sealing rubber ring 27 is fixedly provided at the bottom of the sealing ring groove 9, which can seal and block the containing ring groove 25 without blocking the first airway 20. An extrusion ring 29 is convexly provided at the bottom of the driving ring 1001, and the side of the extrusion ring 29 away from the driving ring 1001 is set in a blade shape. When the driving ring 1001 continues to rotate and insert into the sealing ring groove 9, the extrusion ring 29 is driven to rotate and cut the sealing rubber ring 27 and rotate and seal and insert into the containing ring groove 25, cut the glue storage bag 26 and squeeze the liquid potting glue into the winding chamber 8.

[0064] A one-way exhaust structure is provided at the top of the winding chamber 8 to discharge the gas or excess liquid potting glue in the winding chamber 8 after the liquid potting glue is injected. The one-way exhaust structure includes a groove 30 concavely provided on the upper end surface of the second annular fold 503, a third air channel 31 is provided in the second annular fold 503, and its two ends are respectively sealed and connected with the bottom of the groove 30 and the top of the winding chamber 8, a plug 32 is elastically provided in the groove 30, and a spring 33 is provided in the third air channel 31 with its two ends fixedly connected with the plug 32 and the third air channel 31, when the spring 33 is in the initial state, the plug 32 seals and blocks the third air channel 31, when the pressure in the winding chamber 8 increases, the plug 32 rises to expose the third air channel 31, and descends to continue to seal and block the third air channel 31 after the pressure is restored.

[0065] The specific installation process of the waterproof structure is as follows:

[0066] First, the water retaining ring 6 is sleeved on the outside of the second annular fold 503 and the winding coil 4, and one end of the water retaining ring 6 is inserted into the annular slot 7 for positioning. When the bottom of the water retaining ring 6 fits with the bottom of the annular slot 7, the first installation ring groove 14 faces the first matching ring groove 16, the second installation ring groove 21 faces the second matching ring groove 23, and the telescopic groove 17 faces the locking groove 18. The driving ring 1001 and the driven ring 1002 are sealed and screwed together so that the blade of the extrusion ring 29 is located above the bottom of the driven ring 1002, that is, it does not exceed the bottom of the driven ring 1002. The drive ring 1001 and the driven ring 1002 that are sealed and assembled together are sealed and inserted into the sealing ring groove 9 until the threaded ring 12 touches the threaded ring groove 13. During this process, the drive ring 1001 and the driven ring 1002 squeeze the air in the sealing ring groove 9 into the first sealing airbag 15 and the telescopic groove 17 through the first air duct 20. The first sealing airbag 15 expands and is inserted into the first matching ring groove 16, and is sealingly abutted against the first matching ring groove 16 and the first mounting ring groove 14. The locking block 19 partially extends out of the telescopic groove 17 and is plugged into the locking groove 18. Then, the driving ring 1001 is rotated, and the driving ring 1001 and the driven ring 1002 are rotated synchronously, so that the threaded ring 12 is sealed and screwed into the threaded ring groove 13. The threaded ring 12 and the threaded ring groove 13 are sealed and threadedly connected to achieve fixation. At the same time, the air in the threaded ring groove 13 is squeezed into the second sealing airbag 22 through the second air channel 24. The second sealing airbag 22 expands and is inserted into the second matching ring groove 23, and is sealed and abutted against the second matching ring groove 23 and the second mounting ring groove 21. The driving ring 1001 and the driven ring 1002 rotate until the bottom of the threaded ring 12 abuts against the bottom of the threaded ring groove 13 and the bottom of the driven ring 1002 abuts against the bottom of the sealing ring groove 9. At this time, the through hole 35 is sealed and blocked by the upper end face of the water retaining ring 6, and the first air channel 20 is sealed and blocked by the bottom of the driven ring 1002. The first sealing airbag 15 and the second sealing airbag 22 are fully expanded. The driven ring 1002 cannot continue to descend, so that the driven ring 1002 and the threaded ring 12 cannot continue to rotate. At this time, the driving ring 1001 continues to rotate, and the driving ring 1001 rotates relative to the driven ring 1002 and is sealed and screwed into the sealing ring groove 9, and the positive pressure inside the first sealing airbag 15 and the second sealing airbag 22 will no longer increase.

[0067] As the drive ring 1001 continues to be sealed and screwed into the sealing ring groove 9, the extrusion ring 29 rotates and descends. The blade-shaped side of the extrusion ring 29 first cuts the sealing rubber ring 27, and then cuts the rubber storage bag 26. The liquid potting glue flows into the accommodating ring groove 25, and then is injected into the winding chamber 8 through the glue inlet channel 28 under the sealing and squeezing of the extrusion ring 29. After the liquid potting glue enters the winding chamber 8, it falls to the bottom of the winding chamber 8 under the action of gravity, and the liquid level gradually rises. The positive pressure in the winding chamber 8 increases, the plugging 32 is pushed open, and the gas is discharged from the winding chamber 8 to the outside through the third air channel 31 and the groove 30. After the interior of the winding chamber 8 is filled with liquid potting glue, as the liquid potting glue continues to be squeezed into the winding chamber 8 by the extrusion ring 29, the hydraulic pressure in the winding chamber 8 increases, and the seal 32 can be pushed open, and the excess liquid potting glue can be discharged until the drive ring 1001 stops rotating and the liquid potting glue is no longer squeezed into the winding chamber 8, and the seal 32 elastically falls back to seal and block the third air channel 31.

[0068] After the waterproof structure is installed, the upper end surfaces of the insulating frame 5, the threaded ring 12, the connecting ring 11, the driven ring 1002, the driving ring 1001 and the water retaining ring 6 are located on the same horizontal plane, which is convenient for assembling the stator assembly in the annular chamber 2 of the housing 3. Two insertion grooves are symmetrically arranged on the upper end surface of the driving ring 1001, which can be used to insert the two ends of the "inverted U-shaped" tool, so as to increase the force application point of the rotating driving ring 1001 and facilitate the rotation of the driving ring 1001. After the installation is completed, the tool can be removed.

[0069] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A waterproof motor, comprising a housing (3) equipped with a stator assembly, the stator assembly comprising an insulating frame (5) and a winding coil (4) wound on the insulating frame (5), characterized in that: A waterproof structure is provided on the insulating frame (5) to prevent the winding coil (4) from contacting water; The waterproof structure comprises a water retaining ring (6) which is sleeved outside an insulating frame (5) and forms a winding chamber (8) for winding a winding coil (4) between the insulating frame (5), and a sealing locking structure is provided between the insulating frame (5) and the water retaining ring (6) for limiting the separation of the two and achieving sealing of the winding chamber (8); The sealing locking structure comprises a first sealing airbag (15) and a second sealing airbag (22) which are respectively embedded at the lower end and the upper end of the winding chamber (8) between the insulating frame (5) and the water retaining ring (6), and can expand or contract, a locking block (19) which is telescopically arranged on the inner wall of the water retaining ring (6) and is plugged into the insulating frame (5) when partially extended to prevent the two from separating, and a linkage control structure; The linkage control structure can control the locking block (19) to extend and drive the first sealing airbag (15) and the second sealing airbag (22) to expand, or control the locking block (19) to retract and drive the first sealing airbag (15) and the second sealing airbag (22) to retract.

2. The motor with waterproof function according to claim 1, characterized in that: The linkage control structure comprises a sealing ring groove (9) which is concavely arranged on the upper end surface of the water retaining ring (6) and is connected to the first sealing airbag (15) and the telescopic groove (17) for the locking block (19) to be sealed and telescopic, and a sealing member which can be inserted into the sealing ring groove (9) in a sealing manner. A tension spring (34) is arranged in the telescopic groove (17) to enable the locking block (19) to be separated from the insulating frame (5) under normal conditions. A sealing limit portion is arranged between the sealing member and the insulating frame (5) to enable the second sealing airbag (22) to be expanded while locking the insulating frame (5) and the sealing member when the first sealing airbag (15) is expanded and the locking block (19) is plugged into the insulating frame (5).

3. The motor with waterproof function according to claim 2, characterized in that: The sealing limit portion comprises a threaded ring groove (13) recessed on the insulating frame (5) and connected to the second sealing airbag (22); the sealing member comprises a plug-in ring (10) sealingly plugged into the sealing ring groove (9) and a threaded ring (12) arranged on the plug-in ring (10) and sealingly matched with the threaded ring groove (13).

4. The motor with waterproof function according to claim 3, characterized in that: A receiving ring groove (25) is recessed at the bottom of the sealing ring groove (9), the receiving ring groove (25) is communicated with the winding chamber (8), a glue storage bag (26) storing liquid potting glue is sealed and embedded in the receiving ring groove (25), and an extrusion ring (29) is convexly provided at the bottom of the plug-in ring (10), which can be sealed and inserted into the receiving ring groove (25) when the locking block (19) is plugged into the insulating frame (5) and the first sealing airbag (15) and the second sealing airbag (22) are inflated, so as to puncture the glue storage bag (26) and squeeze the liquid potting glue into the winding chamber (8).

5. The motor with waterproof function according to claim 4, characterized in that: The plug-in ring (10) comprises a driven ring (1002) integrally arranged with the threaded ring (12) and a driving ring (1001) sealingly screwed to the outside of the driven ring (1002); the extrusion ring (29) is convexly arranged on the driving ring (1001); and the rotational resistance between the driving ring (1001) and the driven ring (1002) is greater than the rotational resistance between the threaded ring (12) and the threaded ring groove (13).

6. The motor with waterproof function according to claim 4, characterized in that: The side of the extrusion ring (29) away from the plug-in ring (10) is configured to be blade-shaped.

7. The motor with waterproof function according to claim 6, characterized in that: A sealing rubber ring (27) is fixedly arranged at the bottom of the sealing ring groove (9) to seal and block the accommodating ring groove (25).

8. The motor with waterproof function according to claim 4, characterized in that: A one-way exhaust structure is arranged on the top of the winding chamber (8) for exhausting the gas in the winding chamber (8) after the liquid potting glue is injected.

9. The motor with waterproof function according to claim 8, characterized in that: The one-way exhaust structure comprises a third air passage (31) arranged at the top of the winding chamber (8) and communicating with the outside, and a seal (32) elastically arranged on the insulating frame (5) and sealingly blocking the third air passage (31) in a normal state and rising to expose the third air passage (31) when the pressure in the winding chamber (8) increases.

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